Manage trusted keys

• View all known keys

     signal-cli -u USERNAME listIdentities
  

• View known keys of one number

     signal-cli -u USERNAME listIdentities -n NUMBER
  

• Trust new key, after having verified it

     signal-cli -u USERNAME trust -v SAFETEY_NUMBER NUMBER
  

• Trust new key, without having verified it. Only use this if you don't care about security

     signal-cli -u USERNAME trust -a NUMBER